Canon EOS R5 C VR Creator Kit with RF 5.2mm f/2.8 Dual Fisheye Lens - Manual (Page 732)

Attaching Batteries
1.
Attach the batteries.
Insert the batteries as shown.
When only one battery is used, it can be inserted in either position.
To secure the batteries, push in the direction of the arrows until they
click into place.
To remove the batteries, press the battery magazine lever in the
direction of the arrow.
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